| A. No new substances are generated during the wind power production process, which constitutes a physical change. B. During the biogas power generation process, methane, the main component of biogas, is burned and new substances, carbon dioxide and water, are generated, which constitutes a chemical change. C. No new substances are generated during the hydroelectric power generation process, which constitutes a physical change. D. No new substances are generated during the solar energy production process, which constitutes a physical change. Then choose B. |
Of the following energy conversions, chemical energy is converted to electrical energy: ( ) A. Hydroelectric power B. Thermal power generation C. Tidal power generation D. Wind power
A. DuringIn the process of producing thermal energy, new substances such as carbon dioxide are generated, which constitutes a chemical change.
B. The process of producing hydropower is only energy conversion, no new substances are generated, and it is a physical change.
C. The wind power production process is only an energy conversion, no new matter is generated, and it is a physical change.
D. The geothermal energy production process is only an energy conversion, no new substances are generated, and it is a physical change.
Then choose A.
The main difference between physical changes and chemical changes is: whether other substances are generated; chemical changes not only generate new substances, but are also accompanied by energy changes, which are often exawarded in thermal energy and light energy. . and the release or absorption of electrical energy. Therefore, the elimination method can be used to answer this question.
A. Hydroelectric production is the conversion of gravitational potential energy into electrical energy. This is a physical change that does not meet the requirements for converting chemical energy into electrical energy; B. Thermal energy production is produced by the combustion of combustible materials. The conversion of energy into electrical energy is a chemical change and meets the requirements of converting chemical energy into electrical energy;
C. to convert tidal energy into electrical energy, which is a physical change and does not meet the requirements of converting chemical energy into electrical energy;
D. Wind power generation is the conversion of wind. potential energyinto electrical energy, which is a physical change and does not meet the requirements of converting chemical energy into electrical energy;
So choose B.